journal bearing
1
6.0
- noun
- /ˈdʒɜrnəl ˈbɛrɪŋ/
- Specialized
:
cojinete de journal
- The journal bearing allows the shaft to rotate smoothly by using a layer of lubricant for separation.
Examples
-
Bearings used with early wheels and axles were of plain form (journal bearings), in which a journal or shaft is fitted with a close clearance in a sleeve.
Academic text (2003) -
Kawasaki designers built a single-shaft rotor equipped with two journal bearings to facilitate alignment.
Academic text (1994) -
At that time, oil was commonly fed into journal bearings from the top, which, based on Tower's finding, was exactly the wrong position!
Academic text (1998) -
Tower went on to determine the pressure distribution around a journal bearing, both axially and longitudinally.
Academic text (1998) -
The tilting-pad journal bearings provide fine vibration damping.
Academic text (1994) -
Before Tower's journal-bearing investigations and the subsequent design changes to reduce oil loss, the more viscous lard was an attractive option.
Academic text (1998) -
Tower had already noticed, several decades earlier, that the tangential force of friction on the journal bearing went through a minimum and then increased with velocity, at which point it was fairly independent of load.
Academic text (1998) -
In those early days of lubricant studies, some of the most important experiments were carried out by Beauchamp Tower, who discovered, interestingly, that a hole made in the top of a lubricated journal bearing (cylinder within cylinder) became the source of an oil fountain once the bearing went into motion.
Academic text (1998) -
The mechanic replaced the worn-out journal bearing to improve the performance of the engine.
-
In many machines, a journal bearing is essential for reducing friction and wear on moving parts.
Synonyms
20
6.4
A small part that helps a wheel or machine part turn smoothly
How Complex
- Specialized
1
5.5
- Specialized
8
3.4
- Specialized
1
6.0
- Specialized
20
6.4
Surface Forms
Morphology
The meaning is directly compositional: 'journal' (the rotating portion of a shaft) + 'bearing' (a part that enables smooth rotation) denotes a bearing associated with the journal. This noun–noun type-denoting pattern is a standard, cross-linguistically common composition, so a B1 learner who knows both constituent senses can infer the MWE's meaning.
Etymology
Journal bearing comes from calling the short, round part of a spinning shaft the journal, and the bearing is the support that sits around it. So a journal bearing is the support that holds the journal and lets it 'turn' smoothly on a thin film of oil.